Question

I am using CompareAttribute in MVC3 and its working fine. But I want to use case insensitive classCode. Is there any way to get that working

Thanks in Advance

[CompareAttribute("ClassCode", ErrorMessageResourceName = "ClassCode_DontMatch", ErrorMessageResourceType = typeof(Resources.Class))]
public string ConfirmClassCode {get; set; }

Answer 1

You could write a custom attribute that will perform the case insensitive comparison:

public class CaseInsensitiveCompareAttribute : System.Web.Mvc.CompareAttribute
{
    public CaseInsensitiveCompareAttribute(string otherProperty)
        : base(otherProperty)
    { }

    protected override ValidationResult IsValid(object value, ValidationContext validationContext)
    {
        var property = validationContext.ObjectType.GetProperty(this.OtherProperty);
        if (property == null)
        {
            return new ValidationResult(string.Format(CultureInfo.CurrentCulture, "Unknown property {0}", this.OtherProperty));
        }
        var otherValue = property.GetValue(validationContext.ObjectInstance, null) as string;
        if (string.Equals(value as string, otherValue, StringComparison.OrdinalIgnoreCase))
        {
            return null;
        }

        return new ValidationResult(this.FormatErrorMessage(validationContext.DisplayName));
    }
}

and then decorate your view model property with it:

[CaseInsensitiveCompare("ClassCode", ErrorMessageResourceName = "ClassCode_DontMatch", ErrorMessageResourceType = typeof(Resources.Class))]
public string ConfirmClassCode { get; set; }